<!DOCTYPE html>
<html xmlns:th="https://www.thymeleaf.org">
<body>
<h1>spring boot file upload test</h1>
<form method="post" action="/upload_controller/upload_by_transfer_to" enctype="multipart/form-data">
    <input type="file" name="file"/><br><br>
    <input type="submit" value="submit"/>
</form>
</body>
</html>